Lifting jack



Dec. 18, 1928.

H. P. sALsBURY' LIFTING JACK Filed Deo. 5, 1927 2 She ets-SheAjet 1 Dec. 18, 1928. f 1,696,101

H. P. sALsBuRY v v LIFTING JACK Filed 1366.5, 192! 2 sheets-sheet 2 Patented Dec. T8, 1928.

UNITED STATES PATENT GFFICE.

HENRY PEBCIvAL SALSBUBY, F LONDON, ENGLAND.

LIFTING JACK.

Application led December 5, 1927, Serial No. 237,916, and in Great Britain November 23, 1926.

This invention relates to certain improvements to be used in connection with lifting jacks such as employed forlifting the axles of motor and other vehicles, the main object of the invention being to provide means which will allow the jack to be conveniently moved into its operative position. v

The means constructed according to the i present invention for guiding a lifting jack in position comprises in combination an elongated guiding plate secured or adapted to be secured to either the main spring or the axle ofv the vehicle and a member secured to or capable of being secured to the jack and adapted to engage with the said elongated guiding member, the latter extending suficiently far to allow the jack to be readlly brought into engagement therewith.

The invention also consists in the various constructions and arrangements hereinafter more particularly described by way of example, with reference to the accompanying drawings, in which Figures 1, 2 and 3 are respectively an elevation, a plan view and an'end view of one arrangement according to the invention, in which the guiding means on the vehicle are secured to the main spring;

Figure 4 is an elevation of the same form of construction of guiding means as shown in Figures 1-3, the said means being, however, adapted for being secured to one of the axles of the vehicle;

Figure 5 shows in cross section a modification of guiding head provided on the jack;

Figures 6 and 6 are cross sections of modified guiding means provided on the vehicle and jackrespectively, whilst Figures 7 and 7 are. similar views of a further modification;

`Figure 8 illustrates in sectional elevation a modification of the means by which the guiding means are attached to the vehicle, and

Figure 9 is a perspective view of a detachable head or guide to be used in an arrangement according to the present invention.

Referring to the form of construction illustrated in Figures 1-3, ais an elongated plate secured to thev main spring b of the vehicle, and c are side flanges with inturned ends secured to the plate a to form a channel-like guiding member, d being an end piece secured to the free ends of the said flanges in order to keep them inV position. e is a wedge-shaped member which is preferably interposed between the guiding members a, c and the spring b, being capable of being slid into its proper position under the spring along a slot e1 provided in the plate a, through the intermediary of a in, bolt or the like f and belirmly secured between the said plate and the spring b. g is a hole provided in the plate a in which' a head can be inserted ,for securing the plate to the spring. The guiding means provided on the jack consist of rollers h secured to the top of the jack z' and capable of rolling along the inwardly projecting ends c1 of the side ianges c of the guiding member.

Referring to the form of construction illustrated in Figure 4, j is a bracket secured to the plate a of the guidingmember and formed in such a manner as to conform to the contour ofthe axle and be capable of being secured thereto, bein for this purpose used in conjunction Witi a top clamp and clamping bolts (not shown).

Instead of providing the jack with guiding rollers, the top of the jack may be provided with a head la as shown in Figure 5, capable of being easily slid along the guiding flanges c. f

According to a further modification, as shown in Figures 6 and 6, the guiding member kzprovided on the jack may be formed with side anges 7c, in such a manner that the jack can be guided externally along the edges of a guiding plate a2 secured to the vehicle. A slightly different construction of this modification is illustrated in Figures 7 and 7 a, in which the guiding plate a3 secured to the vehicle is formed with a convex lower surface,

and the upper surfaceof the guiding member 7c3 provided on the jack is correspondingly shaped at 704 to engage with the said convex surface on plate a.

It is to be understood that lthe guiding.

means may be modied in various respects. Thus for instance the wedge-shaped member e hereinbefore described with reference to Figure `1, may be formed with an extension adapted to be inserted underneath the central part of the main spring and be secured thereto by bolts, clamping or otherwise, instead of the plate a being directly secured thereto. This form of construction is illustrated in Figure 8, in which e3 is the extension formed on the Wedge-shaped member e2 secured to the plate a4.

The guiding means provided on the vehicle and the jack may also be modified in variousv respects. Thus, for instance, if use is made of lno a suiiiciently thick plate, the same may be provided with recesses adapted to engage with projections formed in the guiding member secured to the lifting j ack.

According to one particular form of construction as illustrated in Figure 9, the guiding means attached to the jack may comprise a suitably shaped block Z and lateral members m having a middle portion m1 by which they can be attached to the said block and upper and lower curved flanges m2, ma, the said lower flanges m3 being capable of being attached to the head of the jack and the upper flanges m2 serving as guiding means.

The guiding means on both the vehicle and the head of the jack may be made of any suitable material and lifting jacks may be permanently provided with a guiding member intended to engage with guiding means provided on the vehicle. Further, the forms of construction hereinbefore referred to may be modified in various other respects without in any way departing from the spirit of the invention as set out in the claim.

What I claim is:

In combination a vehicle spring, an elongated channelled guiding member firmly sccurcd at one end to the spring, a member on the jack movably engaged with said guiding member whereby the jack may be guided into operative position beneath the spring, and a Wedge-shaped member inserted between the vehicle spring and the guide member inwardly of the opposite end of the latter.

In testimony whereof I have signed my name to this specification.

HENRY PERCIVAL SALSBURY. 

